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51 lines
1.6 KiB
51 lines
1.6 KiB
// David Eberly, Geometric Tools, Redmond WA 98052
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// Copyright (c) 1998-2021
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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// https://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
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// Version: 4.0.2020.01.11
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#pragma once
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#include <Mathematics/PdeFilter3.h>
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namespace gte
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{
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template <typename Real>
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class GaussianBlur3 : public PdeFilter3<Real>
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{
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public:
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GaussianBlur3(int xBound, int yBound, int zBound, Real xSpacing,
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Real ySpacing, Real zSpacing, Real const* data, bool const* mask,
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Real borderValue, typename PdeFilter<Real>::ScaleType scaleType)
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:
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PdeFilter3<Real>(xBound, yBound, zBound, xSpacing, ySpacing, zSpacing,
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data, mask, borderValue, scaleType)
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{
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mMaximumTimeStep = (Real)0.5 / (this->mInvDxDx + this->mInvDyDy + this->mInvDzDz);
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}
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virtual ~GaussianBlur3()
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{
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}
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inline Real GetMaximumTimeStep() const
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{
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return mMaximumTimeStep;
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}
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protected:
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virtual void OnUpdateSingle(int x, int y, int z) override
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{
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this->LookUp7(x, y, z);
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Real uxx = this->mInvDxDx * (this->mUpzz - (Real)2 * this->mUzzz + this->mUmzz);
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Real uyy = this->mInvDyDy * (this->mUzpz - (Real)2 * this->mUzzz + this->mUzmz);
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Real uzz = this->mInvDzDz * (this->mUzzp - (Real)2 * this->mUzzz + this->mUzzm);
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this->mBuffer[this->mDst][z][y][x] = this->mUzzz + this->mTimeStep * (uxx + uyy + uzz);
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}
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Real mMaximumTimeStep;
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};
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}
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